Question

A country can use all its resources to produce Product A and Product B. If you know the opportunity cost of producing Product A in terms of Product B, how can you quickly determine the cost of Product B in terms of product A? Explain in one to two sentences, using an example.

Answer 1

Take the reciprocal: if 1 unit of A costs x units of B (x B per A), then 1 unit of B costs 1/x units of A. For example, if producing 1 A requires giving up 3 B, then producing 1 B requires giving up 1/3 A.